In this episode, the comedic tension centers on Robert’s younger sister, (guest star Tisha Campbell-Martin), and a series of family complications:

The request likely refers to Season 3, Episode 13 of the sitcom , titled " Trying to Love Two (Ain't Easy to Do) " . Plot Summary: " Trying to Love Two (Ain't Easy to Do) "

Because your request includes "All.Of.Us," it might be a partial match for other similarly titled shows. Here are stories from other popular Season 3, Episode 13 installments:

Beyond the immediate drama, Carmen also questions Robert’s unconventional life, including his continued restaurant partnership and complex living arrangements with his ex-wife, Neesee. Other Possible "Season 3 Episode 13" Stories

In a lighthearted subplot, Carmen brings young Bobby a pet frog, much to Neesee's annoyance. The situation turns into a household-wide frantic search when the frog gets loose, and everyone tries to catch it before Neesee discovers it's missing.

Emily's father, Mr. Lopez, visits and ends up in legal trouble, forcing Emily and Luke to navigate the awkwardness of his personality. This Is Us Recap, Season 3, Episode 13 - Vulture